2006 Golf 5 GTI - misfire

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Re: 2006 Golf 5 GTI - misfire

Postby Camo » Thu Aug 01, 2013 9:42 am

Sinbad wrote:I'm starting to see more misfires on my car as well. Will check the HPFP... m-plan ends in September ...


I have two HPFP's!
Mine gave kak last year and decided just to have spares on this thing. But I have MASTERED the Sensor part and know how to fix it. Also changing the Cam follower is a 15min jobbie!
Last edited by Camo on Thu Aug 01, 2013 9:44 am, edited 1 time in total.
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Re: 2006 Golf 5 GTI - misfire

Postby Camo » Thu Aug 01, 2013 9:43 am

Sinbad wrote:
Camo wrote:Any car needs 3-Things to function properly:
-Fuel
-Air
-Spark

That is your basic that you need to check when you have a misfire.


This much I know.
My misfire count tends to increase when I blip the throttle at idle. Given that at that point the rail pressure changes suddenly and quickly, the HPFP would be a logical place to look.


+1
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Re: 2006 Golf 5 GTI - misfire

Postby Sinbad » Thu Aug 01, 2013 9:52 am

Camo wrote:
+1


Doff question - is the problem obvious? What should I be looking for?
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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 01, 2013 10:46 am

ruan9n wrote:PCV fine?

Mmmm - did'nt check.

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 01, 2013 10:47 am

Camo wrote:
The HPFP has two Sensors,..The one on the TOP normally gives kak! I see you made mention that the Thrust Sensor and the Cam follower have been changed.
Do you have a pic of the old cam Follower and can you take a pic of the HPFP to see if the TOP Sensor not Cracked!
Mine never gave EPC light until the crack was worse. The car had very bad misfire and thought it was coils.

When I went to Shaheen @ E-Tuners we found TOP Sensor on the HPFP cracked.

Can email you a pic - struggling to upload it here.

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 01, 2013 10:52 am

ruan9n wrote:When last was the cam follower changed? Is it 100% still?

cam follower also replaced, old one was fine.

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Re: 2006 Golf 5 GTI - misfire

Postby Camo » Thu Aug 01, 2013 12:41 pm

GV wrote:
Camo wrote:
The HPFP has two Sensors,..The one on the TOP normally gives kak! I see you made mention that the Thrust Sensor and the Cam follower have been changed.
Do you have a pic of the old cam Follower and can you take a pic of the HPFP to see if the TOP Sensor not Cracked!
Mine never gave EPC light until the crack was worse. The car had very bad misfire and thought it was coils.

When I went to Shaheen @ E-Tuners we found TOP Sensor on the HPFP cracked.

Can email you a pic - struggling to upload it here.


No problem buddy

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Re: 2006 Golf 5 GTI - misfire

Postby Camo » Thu Aug 01, 2013 12:49 pm

This is what I mean by cracked sensor!

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 01, 2013 1:37 pm

The idling seems ok now - however the misfire is still there under load now.

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Re: 2006 Golf 5 GTI - misfire

Postby ruan9n » Thu Aug 01, 2013 4:49 pm

Km on the car? Have a look in carbon doctor's section on the forum. Have you changed the fuel filter?
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Re: 2006 Golf 5 GTI - misfire

Postby GV » Fri Aug 02, 2013 9:40 am

ruan9n wrote:Km on the car? Have a look in carbon doctor's section on the forum. Have you changed the fuel filter?

99000KM - can't remember when last the fuel filter was changed

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Re: 2006 Golf 5 GTI - misfire

Postby Shygolf » Fri Aug 02, 2013 10:33 am

Do you have access to vagcom?

If you do log the following blocks

002 + 020 + 115

031+ 230 + 231
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Re: 2006 Golf 5 GTI - misfire

Postby GV » Fri Aug 02, 2013 10:38 am

Shygolf wrote:Do you have access to vagcom?

If you do log the following blocks

002 + 020 + 115

031+ 230 + 231

I don't :-(

but thanks!

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Re: 2006 Golf 5 GTI - misfire

Postby Dale » Fri Aug 02, 2013 1:01 pm

Long story short in my case:

Logged low fuel rail pressure (Thanks MacMan), so replaced:

LPFP - in tank, side pressure sensor on HPFP and new fuel filter (the **** that comes out there :crazy: ), cam follower bucket.. Cleared logs after that, car was a bit more responsive but still bogged on WOT.

Upon closer inspection I saw that the plunger shaft was BAAAADLY worn ( about 1 mm :twisted: )
- will see if I can get pics upload of this. (my guess is this) Take off your HPFP again and inspect if its worn or not? I got a secondhand replacement one from Ruan (Thanks!)

Cleared logs again and no more issues. Unfortuneately this is a design flaw and a serviceable part from VW imho. Best to check this every 15000KM. Any wear on plunger, cambucket or follower will result in loss of performance guaranteed

Post some pics of what it looks like.

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Re: 2006 Golf 5 GTI - misfire

Postby Dale » Fri Aug 02, 2013 1:19 pm

Image
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Image
Image

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Mon Aug 05, 2013 1:04 pm

Dale wrote:Long story short in my case:

Logged low fuel rail pressure (Thanks MacMan), so replaced:

LPFP - in tank, side pressure sensor on HPFP and new fuel filter (the s**t that comes out there :crazy: ), cam follower bucket.. Cleared logs after that, car was a bit more responsive but still bogged on WOT.

Upon closer inspection I saw that the plunger shaft was BAAAADLY worn ( about 1 mm :twisted: )
- will see if I can get pics upload of this. (my guess is this) Take off your HPFP again and inspect if its worn or not? I got a secondhand replacement one from Ruan (Thanks!)

Cleared logs again and no more issues. Unfortuneately this is a design flaw and a serviceable part from VW imho. Best to check this every 15000KM. Any wear on plunger, cambucket or follower will result in loss of performance guaranteed

Post some pics of what it looks like.


seems like the problem I'm having now too - my car miss under load +- 2500RPM to 3000 RPM :-(
my car is currently also extremely heavy on fuel.

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Re: 2006 Golf 5 GTI - misfire

Postby Uvy » Mon Aug 05, 2013 5:26 pm

Dude.. Check your throttle body and your FPR
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Re: 2006 Golf 5 GTI - misfire

Postby GV » Tue Aug 06, 2013 1:27 pm

Fanatix Boy wrote:Dude.. Check your throttle body and your FPR

Is this something I can do myself?

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Re: 2006 Golf 5 GTI - misfire

Postby Uvy » Tue Aug 06, 2013 2:13 pm

best to get a mac to check it
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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 08, 2013 1:14 pm

@Dale - do you have part numbers please?

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Thu Aug 22, 2013 10:03 am

Had the fuel filter replaced and the car is MUCH better now - still not 100%. slight stutter now and then +- 2500 RMP

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Re: 2006 Golf 5 GTI - misfire

Postby pologp » Thu Aug 22, 2013 4:21 pm

Mine had the same problem, changed thrust sensor and took out the lpfp and cleaned it and also used injector cleaner about 3 times and problem has gone. Try injector cleaner and see.

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Re: 2006 Golf 5 GTI - misfire

Postby GV » Fri Aug 23, 2013 11:58 am

pologp wrote:Mine had the same problem, changed thrust sensor and took out the lpfp and cleaned it and also used injector cleaner about 3 times and problem has gone. Try injector cleaner and see.

Thanks will try.

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